Engine



wsj. HUNTER.

ENGINE.

APPLICATION FILED IAN.22. 1919,

Patented Apr. 19, i921.

WLLIAM J. HUNTER, OF DENVER, COLORADO, ASSEGNOR T0 THE HUNTER GAS ENGINEAND DEVELOPIMENT COMPANY, A CORPORATON OF COLORADO. i

ENG-NE.

israele.

Application led January 2 To all zu/om it may concern.'

Be it known that I, lViLLIAt/I J. HUNTER, a citizen oit' the UnitedStates, residing at Denver, in the county of Denver and State ofColorado, have invented certain new and useful Improvements in Engines;and l do hereby declare the following to be a full, clear, and exactdescription or' the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to engines, and while particularly intended toapply to engines of the internal combustion type is not limited thereto.

The subject-matter ot the present invention is disclosed in connectionwith an internal combustion engine ot the type which forms thesubject-matter of Patent Number 1,181,892 issued to applicant the secondday of May, 1916, but it is to' be understood that the application ofthe invention is not limited to the particular type of internalcombustion engine so disclosed.

A further object of the invention is to provide an improved type ofconnection between the piston of an engine and the con necting rod, andhas to do with a threaded connection with means for preventing rotationot the piston whereby the threaded connection is unscrewed.

A further object of the invention is to provide means tor connecting aconnecting rod with a piston whereby the entire thrust in bothdirections is taken and carried upon a shoulder bearing against acomplementary shoulder of the adjacent part.

With these and other objects in view the present invention comprisescertain novel constructions, combinations and arrangements oi' partssuch as will be hereinafter more fully described and claimed.

In the drawings:

Figure 1 is a view ot' an engine oi' the type described, showing thecylinder in diametrical section and the connection between the pistonand connecting rod;

Fig. 2 is a plan view of the threaded collar forming the connectionbetween the connecting rod and the piston;

Fig. 3 is a side elevation loi the collar.

Like characters ot reference indicate corresponding parts throughout theseveral igures.

rl`he present invention is disclosed in the Patentedfipr. y19, 1921.

e, 1919'. serial No. 272,602.

drawings as comprising acylinder 10 and piston 11 with a compressionmember or cup 12 slidingly disposed within the piston 11 whereby aninitial compression of the explosive charge within the piston 11 isaccomplished on the explosive stroke or" such piston. The constructionand operation of the piston cylinder and compression means however isnot material to the present invention, said invention residing in themanner ot attaching the piston 11 to the connecting rod 13. Likewise,the connecting ot the connecting rod'13 with the drive shaft 14 is im-Vmaterial to the present invention and is ot substantially the usual andordinary crank type.

rlhe connection between the connecting rod 13 and the piston 11comprises a collar 15 having spaced ears 16, through the openings 17 or"which a pin 18 is inserted, extending also through the end of theconnecting rod 13, with the usual and ordinary means tor taking up wearbetween the connecting rod 13 and the pin 18, which forms no part of thepresent invention.

rllhe collar 15 is screwthreaded as indicated at 19, and engagescomplementary screwthreads formed in the interior of the inner end ofthe piston, shown in the drawings as the lower end. A shoulder 20 isprovided, of greater diameter than the threaded portion, which when thecollar is set abuts against the inner end of the piston, whereby thethrust in either direction, either that of the explosive thrust or thecompression thrust ot' the connecting rod upon the piston, is taken uponthe shoulder 20 and is not carried by the screwthreads.

lt is obvious that it the piston 11 were tree to rotate within thecylinder 10 the result would be the unscrewng of the screwthreadedconnection between the collar 15 and the piston. The collar is ot courseheld against rotation by its connection with the connecting rod 13,which in turn is connected with the crank ot the drive shaft 14, and thepiston 11 is held against rotation by the means disclosed in said PatentNumber 1,181,892; comprising slots 21 formed in the piston, with a bar22 extending transversely, across the cylinder and through the slots ofthe piston, which bar incidentally carries -the cup 12, but prevents anyinclination toward rotation in the piston 11, whereby the piston 11 andconnecting rod 13 are held against rotative movement relative to eachmovement With an interior member, means other and the serewtlireacleclconnection be. for preventing the rotation of said cup pis- 10 tween thecollar 15 and the piston 11 is ton, and a screw cap for said cup havingmaintained. spaced depending ears adapted to mount a What I claim is:removable pitman.

i In an internal combustion engine having In testimony whereof I atlixmy signature.

a cup piston, the interior Walls of said cup being adapted for relativereeiproeative Y WILLIAM J. HUNTER.

